How to stop the Windows 10 Upgrade from downloading on your system

If you are not ready to upgrade to Windows 10 this summer you can keep it from downloading and prompting you to install the upgrade.

From Supersite for Windows:

Microsoft has confirmed that the new OS, currently in its final stages of development, will be made available for download/install on eligible systems on 29 July 2015.

In preparation for that, back in April, Microsoft released an optional update (KB3035583) for Windows 7 and 8.1 that is called the Get Windows 10 app. It provides the prompt that started appearing on users systems (Windows 7 and 8.1) yesterday and gives you the option to reserve your copy of Windows 10.